Gas-burner.



Patented Oct. l5, I90l.

J. BEBNT &. E. CEBVENKA.

6 AS 8 U B N E B (Application filed June 29, 1900.)

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.IOSEF BERNT AND EMANUEL CERVENKA, OF PRAGUE, AUSTRIA-HUNGARY.

GAS-BURNER.

SEEGIFICJLTION forming part of Letters Patent No. 684,404, dated October15, 1901.

Application filed June 29, 1900. Serial No. 22,040. (No model.)

To all whom it may concern.-

Be it known that we, JOsEF BERNT and EMANUEL OERVENKA, merchants,residing at Prague, in the Kingdom of Bohemia, Empire ofAustria-Hungary, have invented certain new and useful Improvements inGas-Burners; and we do hereby declare the following to be a full, clear,and exact description of the invention.

Our invention relates to improvements in incandescent gas-burnersemploying a reversed Bunsen burner. By the employment of a reversedburner the mantle may be suspended at the top, by which means it willavoid the casting of shadows downward and will reflect most of the lightin the same direction.

It is well known that Bunsen burners are employed with great advantagein the production of incandescent gas light. The gas issuing from theburner-head when lighted renders the mantle luminous. The light fromsuch luminous body spreads outward in all directions, which makes itnecessary to provide the burners with reflectors in order to reflect thelight-rays downward. Up to the present this has been impossible to dowithoutexpensivereflectors. Attemptshavebeen made to suspend themantle-head downward. The Bunsen burner as a consequence has also to bereversed. It was found that the gas issuing downward from the burnerwhen lighted retreated through the open nozzle of the burner. The mantletherefore became incandescent only over part of its surface, while thegreater portion of it did not come in contact with the burning gas atall, and consequently gave no light. One way to avoid these drawbackshas been to use gas under considerable pressure, such as is not used innormal gassupplies. Up to the present incandescent gas-burners employinga reversed Bunsen burner have been obtained only in combination withmeans for gasifying suitable liquids under considerable pressure. In thecase of such reversed Bunsen burners the drawbacks above described arecaused by the burners becoming excessively hot, whereby a current of airis produced sufficiently strong to drive the flame back.

The present invention relates to a novel construction of Bunsen burnerwhich will render it applicable under ordinary gas-pressure forattachment to incandescent gas-mantles for casting the light downward.

In the accompanying drawings, Figure 1 is a sectional side view of thegas-lamp. Fig. 2 is a horizontal sectional View on the line 00 m ofFig. 1. Fig. 3 is a side View of the upper part of the burner-tube. Fig.4 is a plan view of the same. Fig. 5 is a sectional View on the line y yof Fig. 1 looking downward. Fig. 6 is a side View of the mantle attachedto its supporting-rim. Fig. 7 is a top view of the rim, and Fig. 8 is afront view of the mantle attached to the burner-tube.

The gas-inlet ct passes through the perforated head and acting upon theinjector principle draws in the requisite proportion of air. The mixtureof gas and air passes through the vertical tube 1) to the burner c. Thetube 1) is made of bad heat-conducting material and forms an isolator.The burner c is formed of metal or some other refractory material. Thetube 5 is supported in position by means of the socket 73 which need notbe made of refractory material. This socket is remov ably secured to thegas-inlet a in the following manner: The latter is provided with a fixedscrew-threaded pin 5, which enters a slot 17, formed within the upperedge of the socket. This pin and slot form a bayonetjoint, which jointmay be further secured by means of the lock-nut .9. The mixture of gasand air, which meets with no impediment whatever in the conduit part ofthe lamp, where it issues from the burner c, is lighted, producing aflame which projects downward and is confined to the shape of the mantleby the contrary air-current produced. Striking back of the flame isprevented, since the isolator prevents the burner becoming excessivelyheated and reversed air-currents are prevented. For the purpose ofdeflecting the hot air away from the sides of the burner a conical headf is attached to the isolator. The mantle d is supported by its upperedge from the isolator in a position adjacent to the burner. The mantlem is advantageously fixed in place by being permanently secured to a rimr. The latter is provided with in-' tegral fingers p, which engage withthe claws q, secured in proper relative position near the lowerextremity of the tube 6. These claws are so adjusted in length as toadmit of the introduction of the fingers between intervening ones and bya partial turn to allow the proper fingers and claws to engage. Theflame reaches the adjacent parts of the mantle and causes the latter tobecome incandescent over a maximum extent of surface.

What we claim is- 1. In an incandescent gas-lam p, a reversed Bunsenburner, having a gas and air inlet, an isolator Z) of bad heat-conducting material below the same, and a burner c at the lower extremity of thesaid isolator, substantially as described.

2. An incandescent gas-lamp having a reversed Bunsen bnrner, gas-inletsat the top thereof, an isolator b of bad heat-conducting material belowthe same, a deflecting-cone on said isolator, and a burner, and mantlebelow 7 7 J OSEF BERNT. EMANUEL CERVENKA.

Vitnesses:

HENRY SOHMOLKA, ADOLPH FISCHER.

